package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_OK, id:" + id + "\t" + "😄";
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            // 设置访问超时时间
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id) {
//        int age = 10 / 0;
        int timeInSeconds = 3;
        try {
            TimeUnit.SECONDS.sleep(timeInSeconds);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_OK, id:" + id + "\t" + "耗时三秒钟";
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_TimeOutHandler, id:" + id;
    }

    @HystrixCommand(fallbackMethod = "paymentCircuitBreakerFallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), // 是否开启断路器保护
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),// 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),// 失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(Integer id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号: " + serialNumber;
    }

    /**
     * paymentCircuitBreaker 方法的 fallback，<br/>
     * 当断路器开启时，主逻辑熔断降级，该 fallback 方法就会替换原 paymentCircuitBreaker 方法，处理请求
     *
     * @param id
     * @return
     */
    public String paymentCircuitBreakerFallback(Integer id) {
        return Thread.currentThread().getName() + "\t" + "id 不能负数或超时或自身错误，请稍后再试，/(ㄒoㄒ)/~~   id: " + id;
    }
}
